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    <title>Document</title>
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<body>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            background-color: #000;
        }
        .wai{
            width: 500px;
            height: 500px;
            margin: 200px  auto;
        }
        .tangquang{
           width: 100px;
           height: 100px;
           background-color: blue;
           position: relative;
           text-align: center;
           margin: 100px;
           font:  600 17px/100px arial;
           box-shadow: 
               0 0 0 10px skyblue,
               0 0 0 20px red,
               0 0 0 30px sandybrown,
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           border-radius: 50%;
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        }
        .tang{
           width: 20px;
           height: 150px;
           margin: -80px 0px 0px 142px;
           background-color: #00BDFB;
           border-radius: 10px;
        }
       </style>
       </head>
       <body>
          <div class="wai">
            <div class="tangquang">儿童节专属</div>
            <div class="tang"></div>
          </div>
</body>
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